Manufacture of brake shoes



Jan. ,1926. 1,571,164

F. ,H. SMITH ET AL MANUFACTURE OF BRAKE SHOES Filed July 1, 1925 I IIII/IIIIIIIIIII'IIIIII I IIIIIIIIJ IIIIIIIIII/l IIII'IIIIIIIIIIII/ INVENTOR 1 FRANK H. SMITH I [7, 5 7 Ewen ms A. SINDEL R 2Z0 ATTORNEY invented a certain'new and useful i ne of the shoes;

Pas es J n; 26,

iJUaITEos AT- S PATENT; oF' 1cE.-

' man]: a. sm rn m) "moms s'nmm, or crnvnnann, om nssrsnons, BY 1 nsnnassmmnrs, 'ro nmnnx BRAKE couramr, or CHICAGO, :mLnroIs, a

Q oonroaarron or rumors.

measures]? or snare snona,

and THom-s A. SINDEL'AB, citizensof the' United 'States, residing'in Cleveland, in the I county-'- of Cuyahoga, State of Ohio, have Imgrovement in the Manufacture oflfrake, hoes, 'of whichthe following is a 1ficat1on.

"This-invention relates to e-manufacture 1 11 0f brake shoes from pressed metal, the shoes illustrated being for an internal expanding automobile brake. An object of'the invention is to form a shoe from relatively light metal without sacrificing its stifiness, by re- 1.! info'rcingit, preferably centrally of theshoe, by one ormore radially-extending flanges integralwithpart of the cylindrical liningsup orting portion of the shoe- In-one -desira 1e arrangement there are two such vflanges engaging each other centrallyof the Another'feature of the inventionrelates to arranging a wear plate to be backed up centrally by the above-described central ra- 25 -di'al flanges, to transmit the force of the cam or other brakeapplying meansdirectlyflto the central web formed by the flanges. J

Other objects and features of the mvention, including a novel method .of formingso the described'shoe, and various novel and desirable details of construction, will be apparent from the following description of the shoe shown in the accompanymg drawings, in which: f

lgure 1 is an elevation of part of a brake,

showmg two of the shoes with an operating 4 cam arranged within a brake drum; Figure 2 is aside elevation of one ofthe shoes on a larger scale;

Figure 3 is a plan view, approximately a on the scale of Figure 1,, of -a blank for formigure 4 is a side elevation showing the first'step. in forming a shoe from the b ank; Figure 5 isa section on the lme 5.5 of Figure 4, showing thechannel cross-section "of the stamping at this stage;

Figure 6 is a partial elevation looking from inside the shoe toward the left in Figure 2,'a'nd showing the mounting of the 1 wear plate; Y

.from -,theblank appear' a. firsttstep, the blan is curved channel-shaped mem er shown in res 4 and 5,-having a central substan i 1y cylindrical-portion 20 and two side .to the central web form V The wear plate shown has a central plane Application am July 1, 1025. Serial no. mesa.

' to Figure 5, but on a larger scale, and showin the next fo the shoe; and I igure 8 is a similar section through the .finishedshoe. v. A f

.In the arrangement selected for illustration, the shoes. 10,-two of which 'a pear in 1 re 1, .are arranged within a 12 operated by a double cani 14 a 1 inst the resistance of a' sprin 16. 'Su'ita le brake lining Q17 (Fig; 2) is intended to face eachshoe Eaoh shoe is shown as a s'tampin formed at 18 m ressed into a Fi t a flanges 22.- Atthe next step, flan es22 are folded-f inwardly (Figure 7) to ave each igure 3.

a cylindrical part 24 underlying the central .part'20, and'a substantially central radially as-shownin Figure 8, with parts 24' in engagement wlth part 20, and with flanges 26 in engagement with each other.

The various parts may be welded, or riv-' provement. 1

At one end an anchor fitting 28 may be riveted or'welded or otherwise secured preferably braced by'a trim formed of tr1angular continuations 30 of fian es' 26.

An important feature of the invention relates to welding orotherwise fastenin in place a wear plate 32bridging the en s of flanges'26 in such a manner as to transmit I plication No. 754,711,, filed December 8th, 1924, by-AdlelY. Dodge, and directed to this imextending flange 26. Finally the wholeis heavily compressed into a T-section shoe;

the thrust of cam 14 or itsguivalent directly portion taking the thrust of the cam, and side flanges cut out for guiding engagement with the cam. v

Hooks'34 for spring 16 maybe provided in any desired manner,

by the flanges.

While one particular shoe has been described in detail, it is not our intention to limit the scope of the invention to that particular shoe, or otherwise than by the terms of the appended. claims.

We claim:

1. A pressed metal brake shoe having a generally cylindrical liningsupporting part extending as a continuous unbroken portion forming the friction face, and a pair of radially-extending reinforcing and stiffenmg flanges between the edges of said friction face and forming the sole stiffening means for the lining-supporting part.

2. A pressed metal brake shoe T-shaped in cross-section and having a continuous and generally cylindrical lining-support ng part forming the friction face and a pair of radially-extending reinforcing and stlffenmg flanges in engagement with each other and arranged between the edges of the friction face.

3. A pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial reinforcing web and mcludmg two parts substantially L-shaped in cross section arranged in engagement back to back with their radial flanges jointly form ng said web, and with the lining-supporting part overlapping the outer flanges of the L- shaped parts.

4. A T-sect-ion pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial reinforcing web and including two parts substantially L- shaped in cross-section arranged in engagement back to back with their radial flanges jointly forming said web, and with the other flanges extending in opposite direc tions from said web and cylindrically curved and with the lining-supporting part forming a double-thickness friction face 5. A shoe as defined by claim 4 having the cyl ndrical lining supporting part integral with the oppositely-extending cylindricallycurved flanges.

6. A pressed metal brake shoe having a generally cylindrical lining-supporting part nd a pair of radially-extending flanges forming the sole radial stiffening for the lining-supporting part, and having a wear plate at one end engaging and supported by said radial flanges.

'7. A T-section pressed metal brake shoe having a generally cylindrical lining-supporting part and a pair of radially-extending flanges between the edges of the cylindrical part and secured in engagement with each other to form a radial web, and having a wear plate at one end engaging and supported by said radial web.

8. A Tsection pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial web formed of two radial flanges in engagement wi h each other and integral with portions of the cylindrical part, and having a wear plate bridging across the ends of the radial flanges and supported thereby.

9. A T-section pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial web formed of two radial flanges in engagement with each other and integral with portions of the cylindrical part, in combination with a separate wear member at the end of the shoe arranged to transmit thrust to both of the radial flanges.

10. A onepiece pressed metal brake shoe having a generally cylindrical lining-supporting part and a pair of radial flanges arranged inwardly from the edges of the cylindrical part and integral with portions of the cylindrical part and of a substantial depth to reinforce and stiffen the cylindrical part.

11. A one piece T-section pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial flange arranged between the edges of the cylindrical part and integral with a portion of the cylindrical part and of a substantial depth to reinforce and stiffen the cylindrical part.

12. A T-section pressed metal brake shoe having a generally cylindrical lining-supporting part and a radial flange arranged between the edges of the cylindrical part and integral with a portion of the cylindrical part and of a substantial depth to reinforce and stiffen the cylindrical part, and a wear plate secured to and centrally braced by the end of said radial flange.

13. A pressed metal brake shoe having a generally cylindrical lining supporting part and a pair of radial flanges integral with portions of the cylindrical part and of a substan tial depth to reinforce and stiffen the cylindrical part. and a, wear plate bridging across and braced by the ends of said radial flanges and transmitting thrust to both of the flanges.

14. A pressed metal brake shoe having a generally cylindrical part and a pair of radial flanges of a substantial depth to rein- 7 force and stiffen the cylindrical part, and a Ill 17. Thatmethod f shbstanti el depth, the body of the shoe being all in one plece.

brake shoe of pressed metal, which oomprises (1) pressmg the metal to form a eylindrieally-curved member Y channel-shaped in cross-section, and then (2) pressing the side flanges toward each other to press parts of forming a; T-section' of them against the bottom of the channel; and other parts into engagement with each 10 other to form a central web;

In testimony whereof we heve hereunto signed our names.

FRANK SMITH. THOMAS A. SINDELAR. 

